Re: TC should't allow check in before save

It has been a long time since I did see NX.I assume you mean check-in in NX. This could be possible using customization (coding). You can explore the "callbacks" in NX. If there is a callback for Check-in (or pre-action) , you can pop-up warning.

Re: TC should't allow check in before save

I am unsure of your NX version but in NX 11, lets say you checkin the part in the middle of your work and continue to do changes, when you try to close the part or directly exit the NX session, you will see the error reminding you of the unsaved changes. Do you see a different behaviour when closing NX ?